I have a set of 30 x 9 x 14 silverbacks I took off my 1000 For sale for $450. There is approximately 300 miles on them. I do not know if they will fit on your machine, as I do not have that machine. You would have to pay shipping.
Can you post a picture? Also what lift?I just got the 28 inch backs and I hate got in the mud yet but they look good and don't drive bad